This exclusive backpack was a cumulative design utilizing the Nimbus frame suspension system and input from numerous US Military Special Operations Operators! We call it the "Nimbus" in our Ultralight Series of "civilian" packs. In our Nimbus Ozone it won Backpacker Editors Choice award, and in our Nimbus Meridian it won Outside's Gear of the Year award. Basically this frame is a lighter-duty version of our CHIEF Framesheet, but still amazingly comfortable and durable. The difference is in the composite material. If you are tired of your load not being supported, your back and shoulders ailing, try this pack. Oh, by the way - all of the CORDURA® fabric and webbing utilized is solution dyed, NIR treated, Triple stitched and built rock solid. This pack comes laptop ready utilizing our ingenious closed cell foam system to protect your valuable equipment.